Add JSatl Candle strategy

API/2355_JSatl_Candle/CS/JSatlCandleStrategy.cs

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+using System;
+
+using StockSharp.Algo.Indicators;
+using StockSharp.Algo.Strategies;
+using StockSharp.BusinessEntities;
+using StockSharp.Messages;
+
+namespace StockSharp.Samples.Strategies;
+
+/// <summary>
+/// Strategy based on Jurik Moving Average slope changes.
+/// Opens long when JMA turns upward and short when it turns downward.
+/// Includes optional stop loss and take profit protection.
+/// </summary>
+public class JSatlCandleStrategy : Strategy
+{
+	private readonly StrategyParam<int> _jmaLength;
+	private readonly StrategyParam<DataType> _candleType;
+	private readonly StrategyParam<decimal> _stopLossPercent;
+	private readonly StrategyParam<bool> _enableStopLoss;
+	private readonly StrategyParam<decimal> _takeProfitPercent;
+
+	private decimal? _prevJma;
+	private int _prevDirection;
+
+	/// <summary>
+	/// JMA period length.
+	/// </summary>
+	public int JmaLength
+	{
+		get => _jmaLength.Value;
+		set => _jmaLength.Value = value;
+	}
+
+	/// <summary>
+	/// Candle type.
+	/// </summary>
+	public DataType CandleType
+	{
+		get => _candleType.Value;
+		set => _candleType.Value = value;
+	}
+
+	/// <summary>
+	/// Stop loss percent.
+	/// </summary>
+	public decimal StopLossPercent
+	{
+		get => _stopLossPercent.Value;
+		set => _stopLossPercent.Value = value;
+	}
+
+	/// <summary>
+	/// Enable stop loss.
+	/// </summary>
+	public bool EnableStopLoss
+	{
+		get => _enableStopLoss.Value;
+		set => _enableStopLoss.Value = value;
+	}
+
+	/// <summary>
+	/// Take profit percent.
+	/// </summary>
+	public decimal TakeProfitPercent
+	{
+		get => _takeProfitPercent.Value;
+		set => _takeProfitPercent.Value = value;
+	}
+
+	public JSatlCandleStrategy()
+	{
+		_jmaLength = Param(nameof(JmaLength), 5)
+			.SetGreaterThanZero()
+			.SetDisplay("JMA Length", "Period for Jurik Moving Average", "Parameters")
+			.SetCanOptimize(true)
+			.SetOptimize(2, 20, 1);
+
+		_candleType = Param(nameof(CandleType), TimeSpan.FromHours(4).TimeFrame())
+			.SetDisplay("Candle Type", "Timeframe for candles", "Parameters");
+
+		_stopLossPercent = Param(nameof(StopLossPercent), 1m)
+			.SetGreaterThanZero()
+			.SetDisplay("Stop Loss %", "Stop loss percent", "Risk Management")
+			.SetCanOptimize(true)
+			.SetOptimize(0.5m, 3m, 0.5m);
+
+		_enableStopLoss = Param(nameof(EnableStopLoss), true)
+			.SetDisplay("Enable Stop Loss", "Use stop loss", "Risk Management");
+
+		_takeProfitPercent = Param(nameof(TakeProfitPercent), 2m)
+			.SetGreaterThanZero()
+			.SetDisplay("Take Profit %", "Take profit percent", "Risk Management")
+			.SetCanOptimize(true)
+			.SetOptimize(1m, 5m, 1m);
+	}
+
+	/// <inheritdoc />
+	protected override void OnStarted(DateTimeOffset time)
+	{
+		base.OnStarted(time);
+
+		var jma = new JurikMovingAverage { Length = JmaLength };
+
+		SubscribeCandles(CandleType)
+			.Bind(jma, ProcessCandle)
+			.Start();
+
+		StartProtection(
+			takeProfit: new Unit(TakeProfitPercent * 100m, UnitTypes.Percent),
+			stopLoss: EnableStopLoss ? new Unit(StopLossPercent * 100m, UnitTypes.Percent) : null);
+	}
+
+	private void ProcessCandle(ICandleMessage candle, decimal jmaValue)
+	{
+		if (candle.State != CandleStates.Finished)
+			return;
+
+		var direction = _prevJma is decimal prev ? Math.Sign(jmaValue - prev) : 0;
+
+		if (_prevDirection <= 0 && direction > 0 && Position <= 0)
+			BuyMarket();
+		else if (_prevDirection >= 0 && direction < 0 && Position >= 0)
+			SellMarket();
+
+		_prevDirection = direction;
+		_prevJma = jmaValue;
+	}
+}

API/2355_JSatl_Candle/README.md

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+# JSatl Candle Strategy
+
+This strategy uses the Jurik Moving Average (JMA) to build a smoothed trend.
+A long position is opened when the JMA turns upward after being flat or downward.
+A short position is opened when the JMA turns downward after being flat or upward.
+Optional stop loss and take profit are applied as percentages from the entry price.

API/2355_JSatl_Candle/README_cn.md

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+# JSatl Candle 策略
+
+该策略使用 Jurik 移动平均线 (JMA) 构建平滑趋势。
+当 JMA 在横盘或下行后向上转折时开多仓。
+当 JMA 在横盘或上行后向下转折时开空仓。
+可选的止损和止盈按入场价格的百分比计算。

API/2355_JSatl_Candle/README_ru.md

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+# Стратегия JSatl Candle
+
+Стратегия использует сглаживающую среднюю Jurik (JMA) для построения тренда.
+Длинная позиция открывается, когда JMA разворачивается вверх после бокового или нисходящего движения.
+Короткая позиция открывается, когда JMA разворачивается вниз после бокового или восходящего движения.
+Опционально применяются стоп‑лосс и тейк‑профит в процентах от цены входа.